Question

All living organisms, including human beings, need oxygen to survive. Unicellular organisms like Amoeba respire through the body surface. Plants respire through minute pores, namely stomata. Likewise, humans also breathe to create energy efficiently. How do we get energy from food? The oxidative process of releasing energy from food in which oxygen is taken into the tissue (from lungs) to oxidize the food in order to release energy and carbon dioxide 25.During the process of exhalation, the ribs move *
Downwards and inwards
Upwards and inwards
Downwards and outwards
Upwards and outwards

Answer 1

Answer:

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Explanation:

Unicellular organisms such as amoeba and paramecium respire through their cell membrane. The cell membrane is thin and permeable to gases. They take in oxygen through the entire body surface and give out carbon dioxide. Exchange of gases takes place through the cell membrane by the process of diffusion.